Palin went on to record a robocall for Didier, telling voters that "unlike establishment candidates who just talk about lower taxes, Clint has signed a pledge to do so." But Rossi easily beat Diddier in Tuesday's primary, besting the former NFL player by more than 20 points.
Palin's candidate also lost out in the Wyoming gubernatorial primary on Tuesday. There, the former vice presidential nominee backed what she referred to as a "Mama Grizzly," State Auditor Rita Meyer.
But Palin's 0-2 showing follows a bigger disappointment last Tuesday, when her hand-picked gubernatorial candidate in Georgia, Karen Handel, lost to fellow Republican Nathan Deal in a close election.